Improvement in fire-plugs



UNITED STATES PATENT OEEIGE.

RICHARD A. HILL, OF WASHINGTON, DISTRICT OF COLUMBIA.

IMPROVEMENT IN FIRE-PLUGS.

l Specication forming part of Letters Patent No. 90,540. dated May 25, 1869.

To all whom it may concern:

Be it known that I, RICHARD A. HILL, of 'VVashingtom in the county of Washington and District of Columbia, have invented a new and valuable Improvement in Fire-Plugs; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a pant of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of an external front view of my device. Fig. 2 is a top view of the same with the cover removed. Fig. 3 is a vertical section thereof.

My invention relates to lire-plugs.

The letterA of the drawings represents a box set in the sidewalk, and having a waterconductor to the bottom thereof, marked B on the drawings. The letter C is a strainer, ad-

A justed as shown, through which the water passes upward to the fire-plug. The letter D is a man-hole. The letter E is a box adjusted on the top of box A, in which I place a series of pipes, marked F, with outlets G. The letter a is the valve-stem, constructed hollow, as shown, and having a valve, e, attached thereto. The letter c is a screw-nut, working on threads on the outer side ofv the valve-stem, as shown, and having threads on its outside adapted to threads on the inner side of the pipe F. This screw-nut c, when raised, admits the water to the pipe through the hollow valve-stem, and when lowered not only closes the opening to said valve-stem, but also opens or uncovers a small aperture through said stem, marked t',

through which the waterremaining in the pipe may pass outward through a similar opening in the pipe itself. The letter sis a commodated with water at the same time; g

also, that freezing of water in the pipe or valve is rendered almost impossible.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The screw-nut c, in combination with the hollow valve-stem a and the waste-water openings, as described, substantially as and for the purposes set forth.

2. The case E, surinounted by a cap, and containing a plurality of plugs, as above described, and constituting a common receptacle for the leakage, all substantially as described.

3. The combination of the parts A and E of the case with an intermediate plate, in which a plurality of plugs is seated, substantially as described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

` RICHARD A. HILL.

Witnesses:

JAMES l. GREvEs, J. M. HYNE. 

